On Tue, Oct 20, 2026 at 05:00:46PM -1000, Linus Torvalds wrote:
> I don't know that code at all, but from my reading it will only
> trigger in fairly unusual cases ("rep movs/ins/outs" that need
> emulation).
Right, and when the src/dst are MMIO, see
case INSN_MMIO_MOVS:
ret = vc_handle_mmio_movs(ctxt, bytes);
which calls that vc_*_mem() gunk.
I presume you've also found:
4954f5b8ef0b ("x86/sev-es: Use __put_user()/__get_user() for data accesses")
which explains why we use those.
> But the replacement code *should* do what __get_user/__put_user did
> before, just with a local helper, so unlike the i915 case it shouldn't
> actually change any semantics.
Yeah, I wanted to take a detailed look on a fresh head but you pulled it
again. :-P
I'll have a look when it shows up again.
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
